that foot loop is the most difficult to position correctly... In my experience, it had to be low enough to get your foot in (from the water), but high enough it didn't kick under the boat too far to be of any use getting your other leg up on to the hull. My N20 had a lot of freeboard. I suspect the F18s have even more...

And my righting line (I called it the "idiot rope" since I was an idiot and got the boat flipped) was slung over the high-side hull when righting, but having it inside on the front beam might have made it easier to step into..